Chattanooga school bus crash: Lives just beginning …

(CNN) — A Spiderman-lover who danced to his favorite YouTube videos. A girl who dreamed of becoming a doctor. A star on the softball field.

Hours after they celebrated Thanksgiving at an elementary school lunch on Monday, their school bus swerved off the road, flipped over and slammed into a tree. Five children died at the scene. One died days later from his injuries.

The deadly crash in Chattanooga, Tennessee, left a devastated community mourning the victims and searching for answers. The bus driver is behind bars, charged with vehicular homicide. But authorities are still working to pinpoint exactly what caused the crash.